R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road > Onroad Nitro Engine Zone

Reply
 
Thread Tools Search this Thread
Old 05-18-2004, 07:52 PM   #61
Tech Fanatic
 
Join Date: Mar 2003
Posts: 783
Default

Quote:
Originally posted by daniz24
Naaahhhh...
I'll just use my standard JP FX T-03 (not this "team" engine) for GQ Cup laahhh...
It's raining everyday Plan to save it for the upcoming Jakarta Open
How about I give you an offer? A very rare custom JP RRL3 based engine? Wanna try baby?
Im offering it to my dearest "kongsi".
He might want to call you right away.
GoldFinger is offline   Reply With Quote
Old 05-18-2004, 09:28 PM   #62
Tech Initiate
 
Join Date: Jan 2003
Location: Brazil- São Paulo
Posts: 37
Default

where are the pics!!!!!!!????? i show you the results after i mod my sirio like you JP!!!!!!
Fura Fura is offline   Reply With Quote
Old 05-26-2004, 04:30 AM   #63
Tech Master
 
BrainTeased's Avatar
 
Join Date: Jan 2004
Location: Melbourne
Posts: 1,342
Trader Rating: 4 (100%+)
Default

Quote:
Originally posted by Ah10
a friend of mine told me when you start pinching the sleeve it will not hold it's shape or size very long!

So are you still suggesting stay away from AAc?
What do you mean by pinching the sleeve?
__________________
www.feralbatteries.com.au
BrainTeased is offline   Reply With Quote
Old 05-26-2004, 01:32 PM   #64
Tech Master
 
DOMOisCOOL's Avatar
R/C Tech Charter Subscriber
 
Join Date: May 2003
Location: Daly City, California, U.S.A.
Posts: 1,914
Send a message via ICQ to DOMOisCOOL Send a message via AIM to DOMOisCOOL Send a message via Yahoo to DOMOisCOOL
Default

Quote:
Originally posted by BrainTeased
What do you mean by pinching the sleeve?
Well, over time, sleeves inside the engine wear out. So if you try to push a piston through the sleeve, it has no pinch (no compression).

Theres a process called pinching and it actually "shrinks" the sleeve almost like it came from the factory. So you'll have more compression. Also, you'll have to re-break-in the engine.
DOMOisCOOL is offline   Reply With Quote
Old 05-26-2004, 04:20 PM   #65
Tech Master
 
Ah10's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2001
Location: Pasadena/Southern California
Posts: 1,370
Send a message via ICQ to Ah10 Send a message via AIM to Ah10 Send a message via Yahoo to Ah10
Default

Quote:
Originally posted by DOMOisCOOL
Well, over time, sleeves inside the engine wear out. So if you try to push a piston through the sleeve, it has no pinch (no compression).

Theres a process called pinching and it actually "shrinks" the sleeve almost like it came from the factory. So you'll have more compression. Also, you'll have to re-break-in the engine.
Thank you!
Ah10 is offline   Reply With Quote
Old 05-27-2004, 04:05 AM   #66
Tech Master
 
BrainTeased's Avatar
 
Join Date: Jan 2004
Location: Melbourne
Posts: 1,342
Trader Rating: 4 (100%+)
Default

Quote:
Originally posted by DOMOisCOOL
Well, over time, sleeves inside the engine wear out. So if you try to push a piston through the sleeve, it has no pinch (no compression).

Theres a process called pinching and it actually "shrinks" the sleeve almost like it came from the factory. So you'll have more compression. Also, you'll have to re-break-in the engine.
Oh!!! i see... thanks for input domo
__________________
www.feralbatteries.com.au
BrainTeased is offline   Reply With Quote
Old 05-27-2004, 09:21 AM   #67
Tech Regular
 
antoniop's Avatar
 
Join Date: Aug 2001
Location: Lisbon, Portugal
Posts: 371
Default

Quote:
Originally posted by daniz24
Do any of you guys spoke French and please tell me what's the meaning of "Moteur rode" on my JP FX box?
Not sure oif anyone already asked you this but it means - Motor already broken in.
Break in already made. God knows how many tanks...
antoniop is offline   Reply With Quote
Old 05-31-2004, 06:21 PM   #68
Regional Moderator
 
daniz24's Avatar
 
Join Date: Aug 2001
Location: D-Square Racing
Posts: 3,189
Default

Thanks antoniop, yes the engine are alerady broken in from the factory...
daniz24 is offline   Reply With Quote
Old 05-31-2004, 06:55 PM   #69
Tech Fanatic
 
teammpp's Avatar
 
Join Date: Mar 2004
Location: Northern Ireland
Posts: 894
Default

Quote:
Originally posted by DOMOisCOOL
Well, over time, sleeves inside the engine wear out. So if you try to push a piston through the sleeve, it has no pinch (no compression).

Theres a process called pinching and it actually "shrinks" the sleeve almost like it came from the factory. So you'll have more compression. Also, you'll have to re-break-in the engine.
Never heard of that one before. I would have thought is you squeezed the sleeve, not only would it be loose in the case but the chrome plating could come loose or start flaking away from the rest of the sleeve. Either of these would render the sleeve useless.

I have used the piston spreading technique before. It expands the piston to give you more compression but it only lasts a short time. I actually watched my dad years back holding a piston in his hand (gripped between his finger and thumb) and spread it with a pair of heavy duty pliers at the trackside. That engine ran for a further 2 months without any problems. Not that I would recommend doing this off course

But I really believe that once an engine starts loosing its compression it is cheaper in the long run to replace the P/S set. While the engine might still run for short periods with little compression it is hurting the conrod, crankpin and bearings due to being able to rev harder.
teammpp is offline   Reply With Quote
Old 06-01-2004, 07:18 AM   #70
Tech Elite
 
Taylor-Racing's Avatar
 
Join Date: Sep 2002
Location: Melbourne OZ
Posts: 2,066
Default

I'd generally agree with Palmaris Europe.

However, when faced with a X/12 Rody that absolutely flew till it ran out of compression, I figured I'd try the osrocket sleeve pinching service.
What the heck, it was a A$27.00 investment in a A$650.00 engine.

The sleeve to crankcase fit wasn't noticeably different and there was no sign of flaking chrome or anything nasty. I guess we're talking about very small measurements here, so this should not be surprising.

The piston/liners came back with 4mm of top space after pushing the piston up the sleeve as far as possible by hand. To me this seemed rather excessive but I was advised that it would be OK. I ran a couple of tanks through it and became concerned at what I still considered to be excessive piston sticking at near TDC. These Rody cranks are a bit suspect from day one and I didn't want to risk it. I then lapped the piston using a paste type bath cleaner to get the measurement down to 3.3mm, reassembled it and proceeded with the break in. It now felt a lot better and broke in properly. Feel free to laugh at the method, but it worked just fine.

As I say, I agree with Palmaris Europe's thoughts, but this was a pretty cheap experiment with really no down side. Naturally you should not expect to get a new engine back with just a pinched sleeve since the crank pin will be at least somewhat oval, for instance. So, for 27 bucks, if it only lasts one meeting that's not a bad investment.
I also would not recommend doing this.
Taylor-Racing is offline   Reply With Quote
Old 06-01-2004, 10:32 AM   #71
Tech Adept
 
Join Date: Jan 2002
Location: Puyallup Wa
Posts: 232
Default

I also value Palmaris's comments, but I also have used the OS Rocket method on my C-5. HAd it done last year, and still runs strong to this day. In fact, it pulls them all on the track!!
For 27.00, you realy can' go wrong.
Smitty
smitty is offline   Reply With Quote
Old 06-08-2004, 11:31 PM   #72
Regional Moderator
 
daniz24's Avatar
 
Join Date: Aug 2001
Location: D-Square Racing
Posts: 3,189
Default

JP FX comes with fully hopped-up version...

Black crank case, ceramic bearing, black hardened (and lightened) crankshaft... It cost more than $400, damn the .12 engine get more and more expensive these days
daniz24 is offline   Reply With Quote
Old 06-09-2004, 01:41 PM   #73
Tech Master
 
Ah10's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2001
Location: Pasadena/Southern California
Posts: 1,370
Send a message via ICQ to Ah10 Send a message via AIM to Ah10 Send a message via Yahoo to Ah10
Default

Quote:
Originally posted by daniz24
JP FX comes with fully hopped-up version...

Black crank case, ceramic bearing, black hardened (and lightened) crankshaft... It cost more than $400, damn the .12 engine get more and more expensive these days
Sometimes I kind of think they are way out of line! even cost more then 21 size engine!
Ah10 is offline   Reply With Quote
Old 06-09-2004, 11:15 PM   #74
Tech Champion
 
nitrodude's Avatar
 
Join Date: Aug 2002
Location: Oxnard, CA
Posts: 5,845
Trader Rating: 5 (100%+)
Default

I also tend to agree with P.E.. And I also tried the pinch with OSRocket, and I must say that it works quite well, although I recomed getting a new con-rod after running it in.
__________________
Steven Muller
AKA El Pibe RUFAST? HAHA!!!
Ronin Speed Parts
nitrodude is offline   Reply With Quote
Old 06-10-2004, 12:43 AM   #75
Tech Fanatic
 
finchy's Avatar
 
Join Date: Jan 2003
Location: Australia
Posts: 823
Default

Could someone please explain what this OSRocket is and is there a web site for veiwing this product or some link.
__________________
Inf1nity IF1
OS Speed
KO PRO PO
Runnertime
Hudy
finchy is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
.:Go Engines vs. Jammin Engines:. lanerbrainer205 Nitro Off-Road 20 12-23-2007 04:46 PM
.12 Engines sale all new pipes too. 6 engines ericsp2 R/C Items: For Sale/Trade 1 08-06-2007 02:19 PM
os engines compared to rb engines rhymster Onroad Nitro Engine Zone 4 08-03-2007 05:13 PM
IDM engines and picco engines foampervert Onroad Nitro Engine Zone 5 11-23-2006 05:36 AM
SH engines crazyjr Onroad Nitro Engine Zone 7 01-20-2006 03:13 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:58 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net